Adjustable wrench



Nov. 27, 1928- 1,693,347 A. s. PlNKUS ADJUSTABLE WRENCH Filed March 1927INVENTOR. J I EfidIYUS- BZWI ZJS,

ATTORNEY.

Patented Nov. 27, 1928.

UNITED STATES ABRAHAM S. PINKUS, OF NEW YORK, N. Y.

ADJUSTABLE WRENCH.

Application filed March 7, 1927. Serial No. 173,516.

This invention relates to adjustable wrenches and has for an object toprovide wrenches of this character which are automatic in operation,which are simple to construct and easy to operate. The invention moreparticularly resides in the construction of a novel type of handle, inthe sliding engagement of the jaws and inthe construction of the slot bywhich the jaws are adjustable.

These objects will be more fully understood from the followingspecification and the accompanying drawings in which, Fig. 1 is ageneral view of a wrench constructed according to my invention, Fig. 2is a cross-section of the handle on line 2-2 in Fig. 1; Fig. 3 is a sideview of the socalled fixed jaw of the wrench and Fig. i is acorrespondingend view. jaw and Fig. 6 is an end View of the sliding jaw.Fig. 7 shows a method of forming the jaw from a single forging and Fig.8 is an assembly of Fig. 7.

The present invention is applied to wrenches constructed on the toggleprinciple. That is, the jaws are constructed to slide upon each otherand are pivoted by a toggle action to the handle where a preliminarymovement of the handle brings the jaws together to bear upon the nutwhich is thereafter turned by the wrench handle, and a movement of thehandle in the opposite direction releases the aws so that the operationof the wrench is the equivalent of, a ratchet action. This principle isunderstood to be old and well established in the art of wrenchmanufacture.

The handle of this wrench is formed from a pair of plates the edges ofwhich are formed in a semicircle and the centre depressed so that whenthese plates are brought together and welded along their edges, theyform a cylindrical edge with a depressed interior section and the end isrounded with the opposite end formed into a jaw to engage the wrenchhead, This makes a light, strong and smooth handle which is easy togrip, does not require knurling and the rounded edges prevents it fromengaging other objects as the wrench is operated.

The fixed aw is preferably made from two forgings which are shaped undera drop hammer to include the slot for the sliding jaw when theseforgings are welded on their abutting faces, also an arcuate slotthrough which the sliding aw is pivoted to the handle.

The sliding jaw is provided with a comparatively deep tongue to engagethe slot in Fig. 5 is a side view of the sliding the fixed aw. Atransverse slot is provided in this tongue to engage the pivot of thehandle. This tongue is also undercut on its central lower-edge to clearthe pivot of the fixed jaw and to limit the movement of the aw.

Referring to the drawings, 11 is the handle, 12 is the fixed jaw whichis pivoted to the jaw of the handle 14 by pivot 15, and 13 is thesliding jaw which is pivoted to the jaw of the handle by pivot 16. Thehandle as shown in section in Fig. 2 comprises a pair of plates 11 theedges of which are semi-cylindrical as indicated at 17 and 18 while thecentre is depressed. These plates are welded along their abutting edgesmaking a handle with rounded edges and a rounded end as shown in Fig. 1.These plates are also formed into the disc shaped ends 14 which form apair of jaws to which the wrench head pivotally connected.

The aw in Fig. 3 is referred to as the fixed jaw because the other awslides thereon but it should be noted that this jaw is pivoted in thejaws of the handle 14 by the pivot 15 a through the pivot hole 22. Thisjaw is also preferably depressed at 21 011 each side to receive thediscs 14 of the handle jaw. The arcuate slot 23 is formed in the sidesof this jaw to permit pivot 16 to move freely therein as the 12 moves onpivot 15.

The sliding jaw 13 is provided with a tongue 26 which slides in the slot25 of jaw 12. This tongue is provided with a central transverse slot 27which is engaged by the pivot 16 of the handle 11 and through which thetoggle action is obtained for the movement of the jaws of the wrench. Itwill be noted for instance, if jaw 12 is stationary and the handle movedto the right, jaw 13 will he slid towards 12 and a movement of thehandle in the opposite direction will reverse this action.

It will be noted from the dotted outline of the relation of the jaw 12to jaw 13 in Fig. 5, that the ends a and b of the tongue 26 projectbelow the pivot 24, which is the body of the pivot 15. This is alsoshown in Fig. 4. The free movement of jaw 13 requires that its loweredge be undercut as at 28 to clear 24. It is apparent that the pivot 24,when in place, acts as a stop to limit the movement of the sliding jawin the slot 25. r

The fixed aw may be made from a pair of forgings as indicated in Fig. 4and which are welded on their abutting faces on the line h9 ees; Wherawle isfar grooved as inflieated at 31'so thatth'eiooiners an accuratebearing for the tongue 26; Another method of foflfii-ngFthe-ffiXed. jawis shown in Figs. 7 and 8. The ja y lg is formed from one forging splitandspread apart as shown in the wings 35 and haying the end projections36 on the opposite side.

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